On the reactions p + p → p + Λ + K + and p + p → p + Σ 0 + K + near thresholds

The cross sections for the reactions of the strange production p + p → p + Λ + K+ and p + p → p + Σ0 + K+ near thresholds of the final states pΛK+ and pΣ0K+ are calculated in the effective Lagrangian approach. Our approach is based on the dominant contribution of the one–pion exchange and strong interaction of the colliding protons in the initial state. The theoretical values of the cross sections agree reasonably well with the experimental data. The polarization properties of the Λ and Σ0 hyperons are discussed. E–mail: [email protected] E–mail: [email protected], Physics Department, University of Arizona, Tucson, Arizona 85721, USA